Closure



Jan. 18, 1944. A. |sE|.l.-'.

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Patented Jan. 18, 1944 UNITED .STATES PATENT OFFICE 2,339,702 -.oLosURE Alphons Isele, Neudorf, Switzerland Application July'10, 1940, Serial No. 344,6391;

1 Claim. (Cl. 2215-40) This invention relates to air-tight and watertight closures for bottles and other containers of different forms and types and made of any suitable material, such as glass, sheet metal, such as aluminum, Bakelite, porcelain, and the like.

An object of the present invention is the provision of a closure for bottles, glasses and cans for fruits, preserves, meats and the like, said closure being so constructed that it remains tight at a predetermined pressure prevailing within .the

container.

Another object is the provision of a closure for bottles and other containers, which is capable of performing tl'le function of a, safety-valve to allow some fluid to escape from the interior of the container until the pressure within the container drops to a desired level.

Other objects of the present invention will become apparent in the course of the following specification. i

The invention will appear more clearly from the following detailed description when taken in connectionwith the accompanying drawing showing by way of example preferred embodiments of the inventive idea.

In the drawing: E. Figure 1 shows partly in side elevation and partly in section a bottle carrying a cover.

Figure 2 shows partly in section and partly in bottom view the cover illustrated in Figure 1.

Figure 3 is partly a section through and partly a side elevation of the cover shown in Figure 2. Figure 4 is a top view of the packing ring shown in Figure 1.

Figure 5 shows the packing ring of Figure 4 partly in side elevation and partly in section.

The closure shown in Figures 1 to 5 of the drawing comprises a cover 80 which may be applied over a bottle 8|. The bottle 8| has an annular projection or ring 82 serving as a support for a packing ring 83 provided with a tapered knurled surface 84. The surface 84 may be substituted by any suitable means engaging the cover. The bottle 8| is also provided with an edge or bead 85 and a helical rib 86.,

The cover 80 is provided with outer ribs 81 and inner helical grooves 88 which fit over the rib 86. The interior of the cover 80 is provided with a knurled surface 39` tting over the knurled surface 84 of the packing ring 83;

The inner top surface of the cover 80 carries an annular projection 90 serving as an abutment for a packing ring 9|.

The ring 83 has a knurled surface .84 which is rmly engaged by the surface 89. of the cover 80. Due to this form-of the ring 83, the cover is prevented from becoming loose in the course of` smaller in diameter than the inner diameter of the opening of the bottle 8|, so that when the cover is screwed on, parts of the ring 9| are clamped between the rib and the bead 85.

It is possible to provide the -ribs 81 in such a position upon the cover 80, that the circumferf ence of the cover will be diminished instead of increased, when the cover is screwed on.

The described constructions of the packing ring and the parts :zo-operating therewith, make it possible to close a container in a secure air-tight and water-tight manner merely by screwing the cover upon the container; this secures the cover rmly upon the container, so that it cannot fall off even when inner pressure forces are developed within the container or when the container is shaken in the course of transportation. However, the cover may be conveniently removed or the described closures, since packing rings of the described type can be' applied over beads or depressions provided in the necks of existing bottles or containers.

The packing rings prevent the formation of drops upon the edges of containers, so that after a liquid is poured out of tie container no further drops can be formed.

Another advantage ofthe packing rings is that they protect the neck and edges of thev bottles or containers from cracking, breakage or other damage.

It should be noted that the exact dimensionsfof the covers for the containers can be' determined only after the placement of the packing rings upon the containers since only then it is possible to determine the extent of shrinkage or contraction of the container resulting from the strain upon the material. of the packing rings, which is admissible up to 10%. v

Bottles provided with closing means of the described type are particularly suitable for the manufacture of sparkling wine or sparkling hock, since in the manufacture of these wines it is necessary to shake the bottles many times.

lIt is easy to close and open the described covers inthe course of this manufacture.

Since the bottom of the cover presses against.

the edge of the container when the latter is closed, drops of liquid cannot escape out of the container.

The packing rings shown in the illustrated constructions may be provided with the usual locking devices which prevent the rings from 'y turning. However, whenever these devices cannot be used, the rm mounting of a ring may be assured by a suitableselection of the amount of elasticity offthe ring or the material of which it is made. Namely, the elasticity should be so selected that the pressure per unit oi area,

VVcreated by the stress upon the material of the ring, should be greater than the force which is necessary to affix the cover firmly and permanently upon the container or to remove the cover-` from the container; however, to 'avoid a destruction `of the elastic ring, the pressure to which ,it is subjected should not exceed one tenth .of its elasticity limit. Furthermore, the elasticity of the ring should be such that`n0t only the ring Vis prevented from turning, ut that jamming or clamping of the ring is avoi ed aswell.

Through the use of the packing rings, it is possible to overcome securely and without fail any diierences in size which occur in the manufacture of different bottles and containers made of different materials.

When gas pressure within a container becomes too great, the cover may be unscrewed or slightly opened to allow the gases to escape andY thereby diminish 4the pressure, without any danger that the cover will ily out in the air.

It is apparent that the specic illustrations shown above have been given by way of illustration .and not yby way of limitation, and that the structures above described are subject to wide variation and modication without departing from the scope or intent of the present invention, all of which variations and modifications are to be included within the scope of the present invention. 

